Keyboard



FIG. 1 is a top perspective view of a keyboard;

FIG. 2 is a front view of the keyboard of FIG. 1;

FIG. 3 is a rear view of the keyboard of FIG. 1;

FIG. 4 is a left-side view of the keyboard of FIG. 1;

FIG. 5 is a right-side view of the keyboard of FIG. 1;

FIG. 6 is a top plan view of the keyboard of FIG. 1;

FIG. 7 is a bottom plan view of the keyboard of FIG. 1; and,

FIG. 8 is a bottom perspective view of the keyboard of FIG. 1.

Features shown in broken lines in FIGS. 1, 2, 3, 4, 5, 6, 7, and 8, form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 